Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing my new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken lines showing the display screen are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 